Chembook
Chemistry in your hand. In three dimensions.
The reference you reach for mid-problem — 118 elements, the NMR and IR tables, the constants and the glossary — next to ninety mechanisms in 3D, computed orbitals you rotate, and a dynamics lab that runs while you watch.
What is inside
A reference that runs the chemistry, not just prints it.
Each is interactive because the data is real: precomputed quantum chemistry, shipped in the download.
- Reactions90 named mechanisms, frame by frame, arrows on real quantum-optimized geometries.
- OrbitalsComputed isosurfaces, s through f to molecular orbitals, on a tappable energy ladder.
- VibrationsNormal modes animated on the structure, with symmetry labels and IR/Raman activity.
- DynamicsArgon condensing, water freezing, salt dissolving. Velocity Verlet, Langevin thermostat, live g(r).
- QuizSix timed, scored modes, periodic table to amino acids.
- Periodic tableAll 118 elements, with trends and full property detail.
- StructuresChair flips, anomers, unit cells, and a Ramachandran plot.
- Spectroscopy¹H and ¹³C shifts, IR and Raman bands, MS and UV–Vis, each row plottable.
- ReferenceConstants, nomenclature, a glossary, and calculators that respect significant figures.
- NotesYour working, saved on the device.
Screen by screen
What it actually looks like.
Reactions
Visualizer
Orbitals
Vibrations
Dynamics
Scenarios
Quiz
Periodic table
Structures
Spectroscopy
Encyclopedia
Calculators
Notes
Offline by construction
Every byte of it is already on your device.
Every mechanism, orbital cube, spectrum and table ships inside the download. No network requests at all.
It works the same on a plane or in a basement lab — and there is nothing to collect: no account, no sign-in, no server.
Progress and quiz results live in the app’s own storage, and Settings → Reset all data erases them. We have declared Data Not Collected on the App Store. Read the Chembook privacy policy.
Pricing
Most of it is free. One purchase unlocks the rest.
No subscription, no ads. One purchase, restorable on any device you own.
Free
$0 no account
- 20 core mechanisms in 3D, with electron-pushing arrows
- Every other module in full, from the periodic table to the dynamics lab
- Free rounds in each quiz mode
Not a trial that expires.
Pro
$6.99 once, forever
- Everything in Free
- All 90 mechanisms, named and organometallic included
- Unlimited quiz play, and every Pro feature added later
Handled by the App Store; we never see your payment details.
On the App Store
Chembook is out now for iPhone and iPad.
Free to download, with one optional $6.99 purchase. A Qemica Lab app.